| Cynnwys | Templed Cylch |
| Pwyntiau Gwerthu | |
| Nodweddion | Dyluniad aml-swyddogaethol, syml a manwl |
| Defnydd | Tynnwch y llinell syth a'r cylch , mesurwch yr hyd a'r ongl |
| Paramedrau | Φ0.1cm-Φ3.5cm |
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